High-quality black-and-white photographs of large old machines and tools

Cyclotron particle accelerator. August, 1939.

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https://diqn32j8nouaz.cloudfront.net..._cyclotron.jpg

More: https://en.wikipedia.org/wiki/Cyclotron

Cyclotron, huh? Where are the pedals? [gdr]

Ah yes, Ernest Lawrence at U.C. Berkeley back in the day.

Modern version heats a cup of tea in 30 seconds to a minute. :D

Inside a high-pressure steam drum.

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https://diqn32j8nouaz.cloudfront.net...steam_drum.jpg

Looks very dusty in there.

That will be the oxide layer. Steam strips every last molecule of preservative from the surface of the steel. But the hot dry environment prevents corrosion forming. So you just get that thin layer of oxide that forms very quickly when the system is depressurized and moisture forms on the surface. A bit like degreasing steel with acid. If you dont apply something to the surface rust will form in minutes

Not sure what I am looking at in regard to the steam drum. Is that the inside of something like this?

Attachment 36837
Attachment 36838

I figured we were looking at the flame chamber and the water was along the sides. ??

Steam condenser inside a generating station. 1943.

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https://diqn32j8nouaz.cloudfront.net..._condenser.jpg